The day after he fired coach Nathaniel Hackett, Broncos CEO Greg Penner noted multiple areas he and the club’s new ownership group intended to overhaul.

The coaching staff, of course, dominated the conversation that day because a search that eventually led to Sean Payton was about to shift into high gear.

Penner, though, also noted he and his wife, Carrie Walton Penner, had been talking with NFL chief medical officer Dr. Allen Sills about potential explanations for Denver being among the most injured teams in the league for a multi-year period.

As the Walton-Penner Family Ownership Group hits its first anniversary of arriving in Denver on Thursday, Payton is the prize addition and the $100-plus million in Empower Field renovations the most expensive project to date. The results of those conversations and months of research on the injury front, however, have led to other key changes in the organization.

“We’ve made lots of little investments, but the big structural change was, in the old days NFL— and this is how we operated until last year — you essentially had verticals,” Penner told The Post recently. “So you had strength and conditioning, training room, nutrition, mental health, sports science, all run by people kind of reporting up through the football ops.”

No longer in Denver.

One of Payton’s hires this winter after arriving in Denver: Beau Lowery, the team’s vice president of player health and performance.

He essentially serves as the person coordinating all of those different teams that a player may deal with while trying to get healthy, stay healthy or make other changes.

“The organizations that have done really well (on the injury front) tend to have one point person, and that’s where we hired Beau,” Penner said. “That was the big difference, because then you start looking, on a player-by-player basis, across those five things rather than the player goes here (to this vertical) and you just look at it this way. …

“So, really changing the lens that you evaluate those players through and then Beau’s brought in a lot of data and sports science, too. Incorporating that into our program is going to be really important as well.”

Payton and Lowery worked together from 2012 to ’21 in New Orleans — Payton was suspended for the 2012 season — and Lowery spent the past two years as the director of sports medicine at Louisiana State University.

“He is tremendous with players,” Payton said. “Part of that is there’s a buy-in and when you’re in that position, you’re selling your program and why it’s good to be here for your rehabilitation in the offseason. I just saw it all take place in New Orleans and it’s hard to find those type of guys. It really is.

“That was a really important hire for us.”

The Broncos added several staffers over the offseason, including a new pair atop their sports science department (director Joe Danos and assistant director Freddie Walker) and a new director of performance nutrition (Ema Thake).

The opening weeks of training camp, of course, provided a harsh reminder that no amount of resources and science are going to prevent injuries in football. The Broncos have already lost receiver Tim Patrick (Achilles) and linebacker Jonas Griffith (ACL) for the season to injuries and have several other key players dealing with injuries that will keep them out from periods lasting from days to weeks. For the second straight season, a prized rookie — tight end Greg Dulcich last year, wide receiver Marvin Mims, Jr. this year — dealt with multiple hamstring injuries before the season even started.

But revamping a staff and modernizing an approach is not like turning off a spigot. The goal is to better understand and manage player health, wellness and injuries over the long term.

The emphasis was made clear in Denver’s first team meeting at the outset of training camp.

“Sean said this in our team meeting and Beau said it as well: ‘We’re here and we’re here for you,’” Carrie Walton Penner told The Post. “It’s all about making sure we’re supporting our players. There’s a lot more I think we can do, but we’re working on it and we’re moving in the right direction.”

Added Penner, “Sean started it off but then it was Beau first and it was education on, here’s what we’re doing with certain players, here’s why, here’s the data. It’s a different way to talk about player health. We’re still going to have injuries, but the goal — everything in the NFL is a game of inches. So instead of having 20 hamstrings if we can have 10. Instead of three ACLs we have two or one. That’s the goal.”

Just one of many for Penner and the Broncos ownership group as they go into Year 2

Asked what else was on his list, Penner thought for a moment, smiled and said, “I’m looking forward to having draft picks.”

But also, “I think it will be great to have some continuity where we have the same coaching staff — there’s always going to be changes — but essentially the same coaching staff going into the next year where we can kind of go through some cycles together where not everything is new every time we’re experiencing it.

”Just kind of having Round 2 of everything, I’m looking forward to that.”

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